package com.hlz.flink.wc;

import org.apache.flink.api.common.typeinfo.Types;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.api.java.utils.ParameterTool;
import org.apache.flink.streaming.api.datastream.DataStreamSource;
import org.apache.flink.streaming.api.datastream.SingleOutputStreamOperator;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.util.Collector;

/**
 * 从socket网络中获取流式数据
 *
 * @author Hongliang Zhu
 * @create 2022-11-27 15:02
 */
public class StreamWordCount {
    public static void main(String[] args) throws Exception {
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

        String hostname = ParameterTool.fromArgs(args).get("host");
        Integer port = ParameterTool.fromArgs(args).getInt("port");

        System.out.println(hostname+":"+port);

        DataStreamSource<String> socketTextStream = env.socketTextStream(hostname, port);
        SingleOutputStreamOperator<Tuple2<String, Long>> outputStreamOperator = socketTextStream.flatMap((String line, Collector<Tuple2<String, Long>> out) -> {
            String[] words = line.split(" ");
            for (String word : words) {
                out.collect(Tuple2.of(word, 1L));
            }
        }).returns(Types.TUPLE(Types.STRING, Types.LONG));

        SingleOutputStreamOperator<Tuple2<String, Long>> sum = outputStreamOperator.keyBy(value -> value.f0).sum(1);
        sum.print();

        env.execute();


    }
}
